Shift point on a auto - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

Mr. Nasty · 04-02-2013, 09:32 PM

On supercharged auto where's your shift point at WOT? Am around 6200 is that being to safe?

The Stig · 04-02-2013, 09:43 PM

This is probably set by swim ever tuned your car. So I suspect your answers will vary depending on how aggressive the tune is and/or what the driver's goals are.

Pro Stock John · 04-02-2013, 10:05 PM

I see stock autos peaking 5800-6000, I'd think depending on which blower (and cam) you have you'd peak much higher than that.

What is your combo?

Mr. Nasty · 04-03-2013, 06:36 AM

I see some on the gear thread pushing it up to 7000-7100 RPM at what point of the high rpm that it help's on the 1/4 run?

Factory Crankshaft
Oliver Connecting Rods
JE Inverted Dome Pistons (approx 9.2 -1 Compression Ratio)
Custom Camshaft (231/248 duration .617/.596 lift)
BTR Platinum Dual Valve Springs
BTR Pushrods
LS9 Headgaskets
ARP Headstuds
ARP Rod bolts
ARP Mainstuds

Power Adder:
Whipple 2.9L Polished Supercharger with Heat Exchanger
12 #'s of boost

grocerygetter · 04-03-2013, 07:00 AM

If your cam likes it up there the tranny will take it. I assume you changed lifters too?
It's all about crossing the quarter in your power band. Gear choice plus shift rpm.

Pro Stock John · 04-03-2013, 04:23 PM

Sounds like a fun combo. Hope you have a trans cooler in there.

I've never had a blower like that but I ran a YSI plus a 236/246 with a 348 cid LS1, and shifted at 7000.

If that was my car, I'd see where it peaked on the dyno. If no dyno numbers and all track tuned, I'd try 6400, 6700 and 7000 and see what the car likes.

Mr. Nasty · 04-03-2013, 07:24 PM

Oh yes lifter were changed.

Am running a 4l80 and a large cooler had to cut back side of bumper to get it in. Ran it for the first time 3 week's ago with the new trans. Was watching shift point's at 6200 RPM but did not pay attention to RPM at end of run in 3rd gear.

Pro Stock John · 04-03-2013, 09:29 PM

6200 feels low to me, I'd at least try 6500 to compare. Since you have a lot of good parts I'd still try 6200, 6500 and 6800. Find out where it levels off.

Mr. Nasty · 04-04-2013, 06:11 AM

Yeah going to the track on the 26th ill dump the shift point up a little.

Alvin@PCMofNC · 04-04-2013, 09:00 AM

6200 seems pretty darn low. You want to overshoot your power peak by 2-500 RPM depending on how flat it is.

Pro Stock John · 04-04-2013, 11:16 AM

Yeah and also depends on converter. You might find that shifting higher with a tighter converter helps ET by dropping you in a better part of your power band.

Mr. Nasty · 04-04-2013, 04:26 PM

Am running a FTI 10.5 triple D 3,000 stall

Pro Stock John · 04-04-2013, 09:17 PM

Converter is nice for the street but tight to maximize that combo. Try different shift points, I bet it picks up. I like testing combos like this, very gratifying.

04-02-2013, 09:32 PM	#1
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	Shift point on a auto On supercharged auto where's your shift point at WOT? Am around 6200 is that being to safe? __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

04-02-2013, 09:43 PM	#2
The Stig knows 2 facts about ducks Drives: ...and they're both wrong Join Date: Aug 2009 Location: The HMS Invincible Posts: 25,072 View My Garage	This is probably set by swim ever tuned your car. So I suspect your answers will vary depending on how aggressive the tune is and/or what the driver's goals are. __________________

04-02-2013, 10:05 PM	#3
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	I see stock autos peaking 5800-6000, I'd think depending on which blower (and cam) you have you'd peak much higher than that. What is your combo? __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

04-03-2013, 06:36 AM	#4
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	I see some on the gear thread pushing it up to 7000-7100 RPM at what point of the high rpm that it help's on the 1/4 run? Factory Crankshaft Oliver Connecting Rods JE Inverted Dome Pistons (approx 9.2 -1 Compression Ratio) Custom Camshaft (231/248 duration .617/.596 lift) BTR Platinum Dual Valve Springs BTR Pushrods LS9 Headgaskets ARP Headstuds ARP Rod bolts ARP Mainstuds Power Adder: Whipple 2.9L Polished Supercharger with Heat Exchanger 12 #'s of boost __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

04-03-2013, 07:00 AM	#5
grocerygetter instigator Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010 Location: 72034 Posts: 3,979 View My Garage	If your cam likes it up there the tranny will take it. I assume you changed lifters too? It's all about crossing the quarter in your power band. Gear choice plus shift rpm. __________________ -John S.

04-03-2013, 04:23 PM	#6
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	Sounds like a fun combo. Hope you have a trans cooler in there. I've never had a blower like that but I ran a YSI plus a 236/246 with a 348 cid LS1, and shifted at 7000. If that was my car, I'd see where it peaked on the dyno. If no dyno numbers and all track tuned, I'd try 6400, 6700 and 7000 and see what the car likes. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

04-03-2013, 07:24 PM	#7
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	Oh yes lifter were changed. Am running a 4l80 and a large cooler had to cut back side of bumper to get it in. Ran it for the first time 3 week's ago with the new trans. Was watching shift point's at 6200 RPM but did not pay attention to RPM at end of run in 3rd gear. __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

04-03-2013, 09:29 PM	#8
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	6200 feels low to me, I'd at least try 6500 to compare. Since you have a lot of good parts I'd still try 6200, 6500 and 6800. Find out where it levels off. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

04-04-2013, 06:11 AM	#9
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	Yeah going to the track on the 26th ill dump the shift point up a little. __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

04-04-2013, 09:00 AM	#10
Alvin@PCMofNC Drives: 2010 IOM RSS Join Date: May 2009 Location: Mooresville Posts: 363	6200 seems pretty darn low. You want to overshoot your power peak by 2-500 RPM depending on how flat it is.

04-04-2013, 11:16 AM	#11
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	Yeah and also depends on converter. You might find that shifting higher with a tighter converter helps ET by dropping you in a better part of your power band. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800

04-04-2013, 04:26 PM	#12
Mr. Nasty Emerald Coast Camaros Drives: 2010 RS/SS Rally Yellow & 68 SS Join Date: Dec 2012 Location: Woodville,FL. Posts: 1,814	Am running a FTI 10.5 triple D 3,000 stall __________________ Best @ 586/525 =10.41 @ 133 AS OF 12/13/14>633 RWHP =10.22@135 AS OF 1/31/15 @ 633 RWHP=10.16@135 AS OF 1/29/16 @ 633 RWHP=10.10@136 TOPED 700 PASSES AFTER F.I. AND STILL ON THE ORIGIANAL STOCK AXLE & DIFF

04-04-2013, 09:17 PM	#13
Pro Stock John Writer Drives: 2010 SS / 1967 Camaro Join Date: May 2009 Location: Chicago, IL Posts: 7,216	Converter is nice for the street but tight to maximize that combo. Try different shift points, I bet it picks up. I like testing combos like this, very gratifying. __________________ PROJECT HEAVY CHEVY Camaro Now: Mods for the Masses Part I \| Part II 13.15@106 1.95 \| 100% Stock 12.37@112 1.85 \| + Kooks Headers/Cats + 20" 555R + CAI + BW TB + UDP + Tune 12.06@113 1.70 \| + CD 3200 + 18" NT05R + RCR Intake + NE OTR + GPI Tune 11.84@115 1.59 \| + 3.91s + Race Star 17x7 Fronts 10.90@125 1.47 \| + GPI VVT Cam + BW Ported Heads + CD 3800